acme: update Directory URL to Let's Encrypt v2
This updates the default Directory URL to Let's Encrypt v2.
Their v1 has been deprecated and new account registrations
will be disabled in Nov 2019. See the following for details:
https://community.letsencrypt.org/t/end-of-life-plan-for-acmev1/88430
There's no good reason to keep the default URL pointing to v1
any longer.
Updates golang/go#21081
Change-Id: I34520e4dfb04a30d82a50559369bac819076d49c
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/200638
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/acme/acme.go b/acme/acme.go
index fde2acb..02fde12 100644
--- a/acme/acme.go
+++ b/acme/acme.go
@@ -44,7 +44,7 @@
const (
// LetsEncryptURL is the Directory endpoint of Let's Encrypt CA.
- LetsEncryptURL = "https://acme-v01.api.letsencrypt.org/directory"
+ LetsEncryptURL = "https://acme-v02.api.letsencrypt.org/directory"
// ALPNProto is the ALPN protocol name used by a CA server when validating
// tls-alpn-01 challenges.
